// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()

// 云函数入口函数
exports.main = async (event, context) => {
  let a = event.a;   //获取小程序端传过来的参数a
  let b = event.b;   //获取小程序端传过来的参数b
  return {r: a+b}
}